theorem b0dvd2 (n: nat): $ 2 || b0 n $;
| Step | Hyp | Ref | Expression |
|---|
| 1 |
|
idvd |
n * 2 = b0 n -> 2 || b0 n |
| 2 |
|
b0mul22 |
n * 2 = b0 n |
| 3 |
1, 2 |
ax_mp |
2 || b0 n |
Axiom use
axs_prop_calc
(ax_1,
ax_2,
ax_3,
ax_mp,
itru),
axs_pred_calc
(ax_gen,
ax_4,
ax_5,
ax_6,
ax_7,
ax_10,
ax_11,
ax_12),
axs_peano
(peano2,
peano5,
addeq,
muleq,
add0,
addS,
mul0,
mulS)